whippersnapper
whip·pers·nap·per
noun
1.
someone who is unimportant but cheeky and presumptuous
Origin
Extension of *whip-snapper (“a cracker of whips”), or perhaps from snipper-snapper. Compare also whipperginnie (“term of abuse for a woman”), late 16th c.
Related words
Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.